clasped behind him and his eyes fixed on the floor. Then he went to the door, opened it, looked out, shut it and locked it, and then came back again and sat down without a word in his chair, staring steadily at the impassive face of the mummy in the packing-case.

'Why, what's the matter, doctor?' said the professor, a trifle sharply. 'You don't suppose I am afraid of anyone coming to steal my treasure, do you?'

'My dear fellow,' said Djama, looking him straight in the eyes, and speaking very slowly, as though his mind was doing something else besides shaping the thoughts to which he was giving utterance, 'I don't for a moment suppose that there are thieves about, or that, if there were, any burglar with a competent knowledge of his profession would think of stealing your mummy, priceless as it may prove to be. I locked the door because I don't want to be interrupted. I want to talk to you about a very important matter.'